web开发项目连接访问数据库

 1 package com.jr.servlet.check;
 2
 3 import java.io.IOException;
 4 import java.sql.Connection;
 5 import java.sql.DriverManager;
 6
 7 import javax.servlet.ServletException;
 8 import javax.servlet.http.HttpServlet;
 9 import javax.servlet.http.HttpServletRequest;
10 import javax.servlet.http.HttpServletResponse;
11
12
13
14 public class DBTestServlet extends HttpServlet {
15
16     private static final long serialVersionUID = 1L;
17
18     protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
19         doPost(request, response);
20     }
21
22     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
23         try {
24             Class.forName("oracle.jdbc.driver.OracleDriver");
25             Connection con= DriverManager.getConnection("jdbc:oracle:thin:@localhost:1521:orcl","neworcal","tiger");
26             if(con==null){
27                 System.out.println("连接失败");
28             }else{
29                 System.out.println("连接成功");
30             }
31
32         } catch (Exception e) {
33             // TODO Auto-generated catch block
34             e.printStackTrace();
35         }
36     }
37
38 }

xml文件的配置：

访问网页：

连接数据库成功：

原文地址：https://www.cnblogs.com/ztt0918/p/8270533.html